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Poly(acrylic acid)

NameM.RASHID

Roll No M13-314

Semester 5th 

Metallr!y a"d Materials #"!i"eeri"!De$artme"t  %"i&ersity ' he P"*a+

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I"trodctio"

Poly(acrylic acid) (PAA or Carbomer) is generic name for synthetic highweight polymers of acrylic acid.A super-absorbent (AP) or polyacrylic acid was patented in 1!"" by #of %ow Chemical and Carlyle $armon of &ohnson ' &ohnson. t was rst u

diapers in 1!*2 in &apan.+olecular mass is ,ariable

Characteris

• ,olor less liid at room a"d $ressre.a" irretati"!

• Polymerises easily a"d hi!

reactio" /he" e$oses to • Stro"! corresi&e a!e"t to

li0e co$$er a"d +rass.• S$er a+sor+a"t $olymer.• Diclt to ha"dle "der i"

atmos$here

I%PA, Name

  ($ro$-2-e"oicacid ($oly)

(,3H4'2)"

Mo"omer Acrylic acid,3H4'2

http://en.wikipedia.org/wiki/Polymerhttp://en.wikipedia.org/wiki/Acrylic_acidhttp://en.wikipedia.org/wiki/Acrylic_acidhttp://en.wikipedia.org/wiki/Polymer

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Acrylic acid is ote" $olymeried +y the ADDII'N P'M#RI6AI'N he sita+le $rocess or additio" $olymeriatio" o acrylic acid is #M

PR',#SS IN 7A#R.  he i"itiator( 'r!a"ic $er oide) is /ater sol+le a"d ree radicals a

mo"omers di8se i"to the hydro$ho+ic i"terior o micelles /hile /at

to hydro$hilic eterior o"e.

Polymeri/ation +ethod

,a" also +e $olymeried +y +l0 $rodctio" $rocess si"! a mo"omer. 9t this method is "ot !e"eral or ty$ical method o$olymeriatio" or Acrylic acid.

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#rades

1. echnical grade (!)or esterication

2.#lacial grade (!*-!!.0 byweight and ma4imum of 5.3water by weight)or production of water solubleresins.

Physical Prope

!

D

,hemical Resista"c

H2' A+sor$tio"

,orrosi&e resista"c

About crystallinity of PAA666t is brittle in natureAt temperatures abo,e 255 to 205oC7 it loseswater and becomes an insoluble crosslin8edpolymer anhydride. olubility of dried PAA inwater increases with rise in temperatures 

Polyacrylic acihydro$hilic - it/ater. hat?s +the car+oylic (,''H) i" the /hich ca" hydto /ater molec

p$ for 1

in water is2.9 to 3.5

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,ommercial A&aila+ility

• PAA in the form of white and fluffypowder having very fine

Particles .it has the ability to swell

water many times than its weight • Also a,aible in the form of li:uid.

Processi"! ech"ies

• Water emulsion process• Injection molding• Extrusion

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A$$licatio"s

• Poly(acrylic acid) is sed i" deter!e"ts to remo&ecalcim a"d ma!"esim io"s rom the /ater@ thssote"i"! it. his has mea"t that $hos$hates "eed"ot +e sed or this $r$ose ths $rodci"! a mch

more e"&iro"me"tally rie"dly deter!e"t.

• I" Bi!reC he child?s shoes are made o a a+ric/ith $ores /hich allo/ air to circlate aro"d theeet. hey are li"ed /ith a eece made o$oly(acrylic acid). I" the /et@ the $olymer soa0s $the /ater a"d e$a"ds@ seali"! the shoe@ ma0i"! it/aterti!ht. 7he" dry@ the /ater e&a$orates a"dthe $olymer co"tracts allo/i"! the eece to +ecome$oros to air.

• Poly acrylic acid a"d its deri&ati&es are sed i"dis$osa+le dia$ers@E1F io" echa"!e resi"s a"dadhesi&es. hey are also $o$lar as a thic0e"i"!@dis$ersi"!@ ss$e"di"! a"d emlsiyi"! a!e"ts i"$harmaceticals7 cosmetics and paints

http://en.wikipedia.org/wiki/Disposable_diapershttp://en.wikipedia.org/wiki/Polyacrylic_acid#cite_note-1http://en.wikipedia.org/wiki/Thickening_agenthttp://en.wikipedia.org/wiki/Dispersanthttp://en.wikipedia.org/wiki/Suspension_(chemistry)http://en.wikipedia.org/wiki/Emulsifierhttp://en.wikipedia.org/wiki/Pharmaceutichttp://en.wikipedia.org/wiki/Cosmeticshttp://en.wikipedia.org/wiki/Cosmeticshttp://en.wikipedia.org/wiki/Pharmaceutichttp://en.wikipedia.org/wiki/Emulsifierhttp://en.wikipedia.org/wiki/Suspension_(chemistry)http://en.wikipedia.org/wiki/Dispersanthttp://en.wikipedia.org/wiki/Thickening_agenthttp://en.wikipedia.org/wiki/Polyacrylic_acid#cite_note-1http://en.wikipedia.org/wiki/Disposable_diapers

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Rece"t Research

;imitations

• Reacts immensly when exposes to heat,metals etc.• Not easy to control under inert conditions .• No resistance to solvent(water ) highly !rittle with high concentration..

1. a crossli"0ed $oly(acrylic acid)=atta$l!ite s$era+sor- +e"t /ith a /ater a+sor+e"cy !reater tha" 1::: ! H2'=! /as sy"theshas a com$o- sitio" o :.2 /t G o crossli"0er@ 1.: /t G o i"itiatoo atta$l!ite@ a "etraliatio" de!ree o ;:G@ a"d a reactio" teo

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ig.1

ater retention of swollensamples as a function oftime at "5 and 155?C.

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Conclusion

 han8 @ou

uestion

666Any

PAA is o !reat im$orta"ce $olymer de to its s$ea+sor$tio" a"d rete"tio" ality. A"d i" tre it /ilo !reat im$orta"ce also@ +ecase it is the +est mate/hich !i&es the deri&ati&es that are hi!hly resista"t

the corrosio"JJ. So it is re$laci"! the other e$e"scoati"! materialsJJ.

More&er its hi!h /ater rete"sio" $o/er is o !reaim$orta"ce